3results about How to "Large tolerance" patented technology

The utility model relates to a kind of multimode single-fiber bidirectional optical assembly and vehicle-mounted optical module, including lens body, it is characterized by: being equipped with light port, lens A, first prism, lens B, second prism and lens C on lens body, the light port, lens A, first prism and lens B are located on the same axis on the side of lens body, the second prism and lens C are located on the same axis on the other side of lens body, the first prism and second prism are parallelly arranged and on the same water surface, and the optical path between the two is communicated.The utility model provides a kind of multimode single-fiber bidirectional optical assembly design scheme applied to COB packaging at low cost, and scheme can be formed by mould once, and batch production at low cost can be realized.In addition, scheme tolerance is big, can realize VCSEL chip and PD chip simultaneous coupling, reduce the difficulty of vehicle-mounted optical module packaging, promote the acceleration industrialization of vehicle-mounted optical module.

The application discloses a filter based on a multi-mode subwavelength grating. The filter comprises a mode demultiplexer for multiplexing and demultiplexing of a base mode and a high-order mode, a subwavelength grating for weakly binding regulation of a mode field of the base mode and the high-order mode, and a straight-through waveguide for output of the base mode. The application introduces a structure of the subwavelength grating and weakly binding regulation of the mode field, and by virtue of excellent flat dispersion regulation characteristics, the application realizes apodization of the grating while keeping consistent local refractive index of the grating, thereby obtaining the filter with high side mode suppression ratio and no free spectral range limitation, and the filter can realize flat and low-loss spectral response, meets the next-generation large-capacity and high-speed wavelength division multiplexing transmission demand, and has the advantages of simple structure, simple process, excellent performance and the like.

This invention relates to the field of building construction technology and discloses a precast column and an assembled concrete structure. The precast column includes a column body and a steel reinforcement cage. The column body is typically a concrete structure. The steel reinforcement cage includes multiple steel bar bundles, which are disposed within a first column cavity, with each bundle corresponding to one of the first column cavities. Each bundle includes multiple column steel bars, the first end of which extends out of the first column cavity. The column steel bars within the first column cavity enclose and form an lap space. The column steel bars extending out of the first column cavity are bent towards the central axis of the lap space to form a bent section. By setting up a first column cavity, the amount of concrete used is reduced, lowering the self-weight of the precast column and the costs of transportation and hoisting. By setting up the extended bent section, automatic centering and guidance are provided when connecting two layers of precast columns, increasing the tolerance for connection, reducing the requirements for on-site construction precision, and improving construction efficiency.